Improvement in wrench



\ v JTrezz 6, 2, mm J L 12 1870 new stars JEREMIAH F. noNAN, JR, or BOSTON, MASSACHUSETTS.

' "Lam Patent No. 105,372, dated July 12,1870.

IMPROVEMENT IN WRENCH.

The Schedule referred to in these Letters Patent and making part Of the'aame.

The same letters are used in both figures to designaic like parts.

This invention relates toadjustable wrenches of the S-type; and I My improvement consists in the constructionaml arrangement of the parts constituting such a wrench, as will he more specifically set forth hereinafter.

In the annexed drawing l j A and B represent the two parts constituting the stem or ha'ndleof thewrench, the surfaces coming in contactg being dressed so that the parts may slide smoot l y upon each other.

The portion A terminates'atone end in an ordinary fiat jaw, A, turned ata right angle from its stem, and away from the part- B, while its other end is constructed with a jaw, A, extending from it in a direction opposite to that of the jaw A, and having a triangular recess cut lengthwise in its interior face, to form the outer jaw of an adjustable socket. This end is also provided with a hammer-head, A, as shown. i

The portion B of the wrench is constructed with similar jaws, B. and B, which, however, are turned from their stem in directions reverse to those in which the jaws A and A are turned from their stem, so that, on attaching the parts together, the double wrench shown in fig. 1 may be formed, one orifice or opening of which will he in the form of a square socket, more especially adaptcdto act upon the axle-nuts of vehicles. i The sides of the recesses in the jaws A and B should be roughened, so that the wrench may not so easily slip oil when used to turn greasy nuts.

The parts A and B areattached together by metallic straps O O, secured to one and embracing the other part. One of the straps, 0', embraces a recesscd portion of thcpart B, whereby the ad nstabih ity of the months of the wrench is limited.

The parts A and B are made to slide longitudinally upon each other, for the purpose of adj usting the size of the mouths of the wrench, by means of a bolt, D, screw-threaded for a portion of its length. Its smooth portion turns in a bearing formed in the end of the part A, so that its axis is nearly in line with the inner surface thereof, while its screw-threaded portion is partly imbedded in a semicircular groove cut in the inner surface of such part A.

The" upper or projecting half of the screw-threaded portion of the bolt extends into a semicircular screwthreaded groove in the part B, adapted to receive the bolt, on turning which such part will be made to slide upon the part A.

The bolt is provided with a knob, D, for turning it, and is prevented from moving longitudinally in its hearing by means of a pin passed through the part A and taking into. a groove cut around the bolt, or in some other convenient manner.

. The form of the recesses in the aws A and B may be changed, to adapt the wrench to be used on nuts, 7

860., other than square.

What I claim as my invention, and desire to secure by Letters Patent, is-- j v The adjustable wrench herein described, consisting of the parts A and B, constructed, respectively, with the jaws -A A and B B, and the adjusting screw D, all arranged relatively to each other, substantially as set forth.

In testimony whereof I have signed my nameto the above specification in presence of two subscribing witnesses.

' J. 1*, RONAN, JR.

Witnesses:

Joan Scnormnn, JOHN F. Bolus. 

